At their annual membership meeting, The Chairman for the Sierra Club, a prominent environmental protection interest group, needed to determine the best way to secure substantial financial contributions for important projects from members that worked better than the secret ballot that produced commitments but meager actual funds. Which of these methods is best

A. the "double arbitrage defense"

B. to involve them in developing and crafting the project.

C. Asking people to make public statements supporting their pledge

D. Only A & B